If you're getting bored with PS4 games there isn't a whole lot on PS5 that's going to keep you too busy. Demon's Souls is probably worth picking up if you never played it on PS3 and Ratchet & Clank Rift Apart looks awesome, but otherwise Miles Morales is on PS4 and Returnal looks kind of meh IMO. I bought my PS5 mostly to play PS4 games like Ghost of Tsushima, The Last of Us Part II, Dragon Quest XI S, Final Fantasy VII Remake, etc at 60 fps and to play the two Spiderman games at 60 fps with raytracing. I have yet to play a PS5 game that's not on PS4... well, unless you want to count Astro's Playroom. Which is a pretty cool game though only a few hours long.